code: def setup_method(self):
      super().setup_method()
      self.vocab = Vocabulary()
      # populate vocab.
      self.vocab.add_token_to_namespace("word")
      self.vocab.add_token_to_namespace("the")
      self.vocab.add_token_to_namespace("an")
  
file_path: allennlp/tests/modules/transformer/toolkit_test.py
imports: import pytest
  import torch
  from torch.testing import assert_allclose
  from transformers import AutoModel
  from transformers.models.albert.modeling_albert import AlbertEmbeddings
  from allennlp.common import cached_transformers
  from allennlp.data.vocabulary import Vocabulary
  from allennlp.modules.token_embedders import Embedding, TokenEmbedder
  from allennlp.modules.transformer import TransformerStack, TransformerEmbeddings, TransformerPooler
  from allennlp.common.testing import AllenNlpTestCase
label_desc: Use image node_id 1 for calling the TestTransformerToolkit obj's underlying member method code with example usage: obj.setup_method() without return types